Caesar knew as well how to gain time as not to lose any: he was not ready; so he put off the Helvetians to a second conference.

In the interval he employed his legionaries, who could work as well as fight, in erecting upon the left bank of the Rhone a wall sixteen feet high and ten miles long, which rendered the passage of the river very difficult, and, on the return of the Helvetian envoys, he formally forbade them to pass by the road they had proposed to follow.

They attempted to take another, and to cross not the Rhone but the Saone, and march thence towards western Gaul.
But whilst they were arranging for the execution of this movement, Caesar, who had up to that time only four legions at his disposal, returned to Italy, brought away five fresh legions, and arrived on the left bank of the Saone at the moment when the rear-guard of the Helvetians was embarking to rejoin the main body which had already pitched its camp on the right bank.

Caesar cut to pieces this rear-guard, crossed the river, in his turn, with his legions, pursued the emigrants without relaxation, came in contact with them on several occasions, at one time attacking them or repelling their attacks, at another receiving and giving audience to their envoys without ever consenting to treat with them, and before the end of the year he had so completely beaten, decimated, dispersed and driven them back, that of three hundred and sixty-eight thousand Helvetians who had entered Gaul, but one hundred and ten thousand escaped from the Romans, and were enabled, by flight, to regain their country.
[Illustration: Mounted Gauls----66] AEduans, Sequanians, or Arvernians, all the Gauls interested in the struggle thus terminated, were eager to congratulate Caesar upon his victory; but if they were delivered from the invasion of the Helvetians, another scourge fell heavily upon them; Ariovistus and the Germans, who were settled upon their territory, oppressed them cruelly, and day by day fresh bands were continually coming to aggravate the evil and the danger.
They adjured Caesar to protect them from these swarms of barbarians.

"In a few years," said they, "all the Germans will have crossed the Rhine, and all the Gauls will be driven from Gaul, for the soil of Germany cannot compare with that of Gaul, any more than the mode of life.